DIIB is like a beginner SEO platform while Moz and SEMRush are for more advanced digital marketers. You can read my reviews on all of these on my website and get more detail on them.
I just started using DIIB and I was super impressed! You can read my review at DIIB Review done by Michael Rock of The Internet Presence, LLC.
It basically combines data from three different sources, Facebook, Google Analytics, and Google My Business to bring you suggestions on how to better your website.
What really impressed me the most was that it is easy for the beginner to use but uses professional data and advice.